#include <stdio.h>
void main()
{
    int n,a,i;
    printf(" The series with equal difference are:\n");
    for(n=1;n<=6;n++)
        for(a=1;a<=4;a++)
            if(4*n+6*a == 26 && n*(n+a)*(n+a+a)*(n+a+a+a)==880)
            for(i=0;i<20;i++)
            printf("%d",n+i*a);
}